Ribbon-reversing mechanism.



PATENTED SEPT. 17, 190'7.

R. A. POLLOCK.l RIBBN BEVER-SING MBGHANISM.

APPLICATION FILED IEB. 6, 1906. v

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UNITED STATES BATRNT OFFICE.

ROBERT A. POLLOCK, or KANSAS CITY, MISSOURI, ASSICNOR To AMERICAN RECORDING COMPANY, A CORPORATION OF THE DISTRICT or COLUMBIA.

RIBBON-REVERS'IN'G MECHANI'SM.

To all 'whom it may concern: Be it known that I, ROBERT A. PoLLocK, a citizen Ci the United States, residing at Kansas City, -in the county of Jackson and State of Missouri, have inventedy certain new and .useful Improvements in Ribbon-Reversing Mechanism; 'and vI do declare the following to `be a full, clearhand exact description of the invention, suchvr as will enable others skilled in the art to which .it appertains to make Vand use the same, reference being had to the accompanying drawings, and tothe letters and guresof reference marked thereon, which forma part 4of this specification.

My .present invention relates to a ribbon'reversing mechanism, and more particularly toa mechanism for automaticallyI reversing the direction of travel of the impression ribbon of atypewriting, ticket printing, or similar machine. In' accomplishing this object I have provided the improved details of structure whichv will presently be fully described andpointdilt.. in the claims, reference being had to the accompanying drawings forming part of the specification.

In the drawings. I have only shown the mechanism relating to my invention, and a means forconnecting this mechanism with a main machine which machine may be of any suitable description.

In the drawings Figure 1 is a detail yiew in front elevation of the impressionribbon reversing shaft and Operating mechanism. 'Fig 2 is a top plan view of Fig. l, also showing the ribbon drums and their carrying rods, and the Pitman having an eccentric connection with the shaft of the main machine. Fig. 3 is a dtail view of the cam and follower Operating the ribbon shaft. Fig. 4 is a detail view of the pi'tman, eccentric,

and ratchet shown in Fig. 2. Fig. 5 is a detail view of the bracket supporting the cainlever.

Projecting forwardly from a cross piece l 'on the frame ofthe main machine are the arms 2--2 having lateral fingers 3--3.v cross piece 1 are the shafts 4 4 which extend-backwardly beyond said cross piece and carry the ribbon drums 5-5. Rigidly mounted on shafts 4-4 are the collars 6 6 of miter wheels 7-7, and surrounding said shafts are the coiled springs 8-8 which abut against the miter Wheels and against the inner surface of fingers 3-3 and yieldingly press -collars 6.-6-

against the outer surface of the brace 1.' Extending through, and journaled in arms 2 2 and revolving in grooves on a pair of brackets 9 9. is a` shtft 10. Rigidly secured to each end of shaft 10 is a miter wheel 1].-11 adapted to mesh with the adjacent wheels 7-7 but said shaft being of such length that while one set of wheclsare in mesh, the set at the opposite end of the shaft will be out of Contact as indicated in Fig. 2. On Shaft 10 between brackets 9-9is loosely mounted a sleeve 12, having a horizontal slot 13 through which Specification of Letters Patent. Application filed February'6,1906. Serial No. 299,714.

lwheel 16.

-the teeth of a ratchet .lournaled in s aid fingers and inv Patented'sept. 17,1907.

is projected a stud 14, carried by shaft 10, and on sleeve 12 is a worm 15 which meshes with the teeth of a spur wheel 16 revolubly mounted on a stub axle 17 on a bracket 18 depending from brace 1`. I

Rigidly secured to, or integral with the inner face of Wheel 1.6 is acaml 16 and axially mounted onastub. axle 1 9 on-braeketl8 is a 'lever 20havingthe arms 21-21 extending on eachv side of cam 16 and each arm having a dog-22-22, adapted to in tum be engaged by. the swell of cam 16 for the purpose of rocking lever 20. On one of said arms 21e-21 is a finger 23, which. extendsupwardly'and is provided with a stud 24 which -.rests ina peripheral slot 25 in collar 26,. integral with or Vrigidly mounted on shaft 10'.

l 2Ol is a forked spring carried on lug 20 on leverf20 and extending upwardly on eachfside of a'1ug'27 on 28 is an eccentric mounted on the' drive'shaft of the i l main machine-,and having a pitman 29, lprovided at its forward end with a blader 30, adapted to engage wheel 31 rigidly mounted on shaft Io. l

` In' use the ribbon is wound on drum l5, and suitably fastened to its companion 5. The drums are then slipped over their shaft, and set screws 32 carrying the springs. 33 are adjusted to anchor the drums to their shafts, and: the shifting mechanism arms arranged with the gear wheels 11 on shaft 10 in meshV with the gear wheels 7.

lAs the main machine is operated, the drive shaft will operate eccentric 28, and reciprocate pitman 29; the forward movement of said pitman forwarding ratchet 31 forwardly through a partial revolution, and the backward Vmovement retracting'said arm until blade 30 engages a succeeding tooth on said wheel. Wheel 31 being rigid on shaft 10, carries .said shaft' through a partial revolution'at each reciprocation of the pitman, such revolution of shaft 10 causingthe shaft 4 to be revolved, and the ribbon to be wound on `drum 5 l The worm on collar l2 meshing with the gear wheel 16, carries said wheel through a partialrevolution in the direction of the arrow, Witheach partial revolution of shaft 10. As the gear wheel re-f. volves, l'ug 27 engages spring 20 carried by collar 20,

vtensioning same in the direction of drum 5. As spur wheel 16 revolves, the cam 16 vis carriedwith it, and the follower ringer 22 is carried up the incline of the cam swell and around said swell until it reaches the edge ofthe jump off, at which point lug 27 will be in the position indicated in Fig. l, when spring 20 exerts its greatest tension to rock follower 20 inthe direction of the drum 5.- As wheel 16 continues to res revolve, the cam is carried beneath finger 22 which is snapped into its seat in the jump-off by the rocking. of follower 20 .through the action of the spring; the

movement-of the follower throwingV the shifting. arm 2s in the same direction, shifting Shaft '1o until wheel 11 is in mesh with wheel 7, and arm 5 is revolved upon further operation of the machine. As the spur wheel travels on around, the lug 27 engages the other member of the spring throwing th tension in the direction-of drum 5 so thatas cam 16 completes the neat one half of a revolution, the finger 22 operates in the same manner as described'with reference to iingr `2 2 and shaft l0 is shifted back to its original position; the partsreversing the direction of the ribbons travel, in this manner indefinitely.

While I havefreferred specifically to a ticket printing and vending machine, to which Vthe presentmech- .anism is applied, the utility of said mechanism in combination with other machines is readily apparent; l Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent '1."1-n a device of 4the classdescribed, a pair of ribbon dr-ums', a driving shaft vadapted for alternately acting on -said drums, a Arocking lever adjacent to and having an arm in engagement with 'said shaft, a cam'adjacent to,'

and adapted for engagement with said lever, a spur wheel rigid on said cam, a worm on said shaft engaging said spur wheel, and means for revolving said shaft.

2. I'n a'device of. the class described, a pair of ribbon drums, a driving shaft adapted for alternately acting on said drums, a rocking lever adjacent to an'd having an arm in engagement with said shaft, 'a cam adjacent to and adapted for engagement with said lever, a spur wheel rigid von said cam, a slotted sleeve loosely mounted on said shaft, a stud on said shaft projecting through said slotfa worm on said sleeve engaging siaid spur Wheel, and means for revolving said shaft.

3. In a'device of the class described, a pair ofs ribbon drums, a driving shaft alternately acting on said drums, a rockinglever adjacent to and having an arm in engagement with said shaft, a cam adjacent to said lever, fingers on said lever adapted for alternate engagement with said cam, means on said shaft for revolving said cam, a forked spring on said lever, and a lug on said cam adapted to alternately engage the separate spring members, for the purpose set forth.

In testimony whereof I affix myy signature in presence of two witnesses.

ROBERT A. PoLnocK.

Witnesses:

.TAMns- ARMSTRONG, FRED W. SMITH. 

